HappyWindows is an entertaining program for your Windows PC. You only have to start your favourite music player and let HappyWindows to animate the screen by having all the windows and frames dancing on the music. There are several dancing styles you can choose. Note: Before using the program you must select (or unmute) the active recording line in the audio mixer (in WinXP: 'Control Panel>Sounds and Audio Devices>Advanced button' to popup the audio mixer; then select Options>Properties>Recording). Also set the maximum value for the recording level to get high sensibility (sensibility may be also set by editting the 'sensibility.txt' file in the program's folder)